/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.graphscope.example.giraph.aggregator;

import com.alibaba.graphscope.example.giraph.writable.MultipleLongWritable;

import org.apache.giraph.aggregators.BasicAggregator;
import org.apache.hadoop.io.LongWritable;

/**
 * Aggregator for summing up long values.
 */
public class MultipleLongWritableAggregator extends BasicAggregator<MultipleLongWritable> {

    @Override
    public void aggregate(MultipleLongWritable value) {
        getAggregatedValue().set(getAggregatedValue().get() + value.get());
    }

    @Override
    public MultipleLongWritable createInitialValue() {
        return new MultipleLongWritable(new LongWritable(0), 1000000);
    }
}
